Pressure-indicating device and alarm-signal.



PATENTED FEB. 11, 1908.

J. H. DIXON. PRESSURE INDIOATING DEVICE AND ALARM SIGNAL.

APPLICATION FILED APR. 7,1906.

III/III "II/IIIIIII/IJIIIIII/IIII/I/III/II/I/I JOHN H. DIXON, OF PITTSBURG, PENNSYLVANIA.

PRESSURE-INDICATING DEVICE AND ALARM-SIGNAL.

I No. 879,039.

Specification of Letters Patent.

Patented Feb. 1 1,1808.

Application filed April 7. 1906. Serial No. 310.565.

To all whom. it may concern:

Be it known that I, JOHN H. DIXON, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Pressure-Indicating Devices and Alarm-Signals, of which the following is a description and which is illustrated in the accompanying drawings, that form part of this specification, and in which like symbols indicate like parts throughout the views.

' The object of my invention is to provide a simple mechanical alarm in connection with a pressure indicator and to provide an auxiliary electrical alarm that can be readily adjusted to noise at a predetermined pressure, and to also noise if the mechanical alarm is not in an intact condition,

For the convenience of brevity in illustrating, I confine my description of the device to its one use in natural gas service; where gas issues from wells, often at several hundred pounds pressure and is reduced through regulators for domestic consumption to ounces pressure. These regulators frequently go wrong and sometimes permit the gas pressure to become abnormally strong, which .blows out the burning flame so that rooms fill with unburned gas; and, at other times permit the pressure to go off entirely, when lights will go out. As this will leave jets open; so if the pressure returns, rooms will be filled with as, as in the first case. This device is calcu ated to meet these contingencies in giving an alarm in either case; that people may look to the valves &c.

Referring to the drawings: Figure 1 is a front sectional view, Fig. 2 a side sectional View, Fig. 3 a to sectional view and Fig. 4 a,

detailview of t e latch and cleat construction, between diaphragm stem and the tilti lever, that locks the clock movement.

he device consists in a frame A having a gas chamber A and a pressure supply tube passing into the chamber under a collapsi- 1e diaphragm O, which is sealed with the.

top rim-of said chamber, to form a bellowslike compartment. This combination will be, hereinafter, referred to as: bellows.

The dia hragm has 'a rigid center piece 0, through which is screwed a stem 1), that has a. toothed section on its upper side, enmesh with the pinion wheel F-from which is extended a dial pointer G, across the face of the dial H -to show on the dial the exact pressure within the-"system.

The spring latch D is extended laterally from the stem fl), to normally restrain the tilting lever I. having a cleat l, and loosely pivoted at 1 from tilting out of the sweep of the hammer arm J that rests against it,

enforced by the energy of the wound clock- 7 spring J, through the main wheel J, the es cape wheel J and its verge J", until the latch may have been carried over or under the said cleat, when the lever will tilt into the position shown in dotted lines, by the inertia of bell-hammer J" and the energy of the spring Jf The" lever 1 will remain in this position until the pin J of the time-dial Wheel N, has thrust it back into position to have its cleat hook the latch of the stem D, and which the said pin will do when the clock spring is nearly run down and the pressure has carried the said latch to a normal positlon, which \Vlll be seen on the dial H when the mechanism may he swam-wound b turning the key P. Outside the'partition and on the end of the shaft ofthe main wheel J is carried a pinion wheel L of an intermedlate gear wheel M, that re enmeshwith time wheel N, that carries the stop pin J that projects through the dial .9 and serves'as an indicator to show the state of the winding, togethrwith the index hand N.

Around the stem D is a compression coil spring D fastened to the saidstem by the collar and screw D, near its bottom; and rests against the bracket A throu h which the stem D passes: this spring tends to collapse the bellows. The auxiliary alarm consists in a battery cell Q, magnets Q armature Q and bell R the same hell that serves in'the mechanical service, heretofore, described. The armature carries a spring circuit controller, (not shown) common in annunciator bells, for the purpose of keeping the bell hammer acting continuously.

A circuit is formed through the battery magnets frame and stem and. the threaded rod Q, or will bemade, when the said rod is made to contact with the stem D; or its compan'ion'spring Q isj made to contact with the pin J they are both insulated from the.

frame A or other'metallic parts which are normally separated from said rod. The said rod Q is threaded and flattened and held from turning, with the wheel Q that rides between said member and said contact, subthrough square slotted insulation P and I, so that the rod will move vertically only, and rotate the worm Wheel Q that in turn, moves the index pointer Q around the setting indeX dial Q Now if it is desired to have an alarm signal in case the pressure within the system gets to 3 ounces*the normal pressure being but two ounces-it will only be necessary to manipulate the wheel Q until the index Q stands at the 3 ounce scale on the dial, and at this pressure the stem D will be forced against the rod Q, Which will form a circuit and set the electrical alarm beli to working, and will so continue, until the rod has been withdrawn. If, on the other hand; the oressure goes ofl' entirely, the latch D will have passed below the cleat 1 of the lever I; when the said lever will be tilted into its dotted lines position, and allow the mechanmechanism normally restrained by said member and having an electrical adjustable contact mounted within the reach of said member and an electrical alarm connected stantially as described.

2. In pressure alarm signals having a bellows propelled member and having a spring wound alarm mechanism and having means of restraining said mechanism arranged between said member and said meclianis-m and having a time indicating wheel driven by said mechanism and having a stop pin car ried on said wheel, substantially as described.

3. In a pressure and alarm signals having a bellows and a bellows controlled member and having an indicator co-acting with said member and having an adjustable contact extendible within the reach of said member and having a normally inactive electrical circuit connected between said contact and said member, substantially described.

4. In pressure alarm signals having a l ellows propelled member and having a spring wound alarm mechanism normally held in restraint by attachments integral of said member and having an electrical alarm mechanism arranged to close when said spring wound mechanism is in an unwound condition or to close when said member is contacted with a separate adjustable contact member, substantially as described.

In testimony whereof I have hereunto set my hand, this 5th day of April, 1906, in the presence of two witnesses.

JOHN Ii. DIXON.

Ni messes C. W. BAKER, l). S. ()RCUT'I. 

